99738459648 has 240 divisors, whose sum is σ = 299498799600. Its totient is φ = 33136459776.

The previous prime is 99738459643. The next prime is 99738459649. The reversal of 99738459648 is 84695483799.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99738459643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43420036 + ... + 43422332.

It is an arithmetic number, because the mean of its divisors is an integer number (1247911665).

Almost surely, 2^99738459648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99738459648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149749399800).

99738459648 is an abundant number, since it is smaller than the sum of its proper divisors (199760339952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99738459648 is an equidigital number, since it uses as much as digits as its factorization.

99738459648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679 (or 2651 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 72.

The spelling of 99738459648 in words is "ninety-nine billion, seven hundred thirty-eight million, four hundred fifty-nine thousand, six hundred forty-eight".